Radio apparatus



Oct. 10, 1933.

A. M. TROC-:NER 1,929,939

RADIO APPARATUS Filed Aug. 19, 1931 5 Sheets-Sheet l A E?. E; l

lNVENTOR Arthur M. Trngnr ATTORNEY Oct. 10, 1933. A. M. TROGNER RADIO APPARATUS Filed Aug. 19. 1951 3 Sheets-Sheet 2 INVENTOR Artgur M. TI'DHIIEI ATTORNEY A. M. TROGNER RADIO APPARATUS Oct. 10, 1933.

Filed Aug. 19. 1931 3 Sheets-Sheet 3 Trngnr ATTORNEY INVENTOR Arthur M m ...im In m Patented Oct. l0, 1933 PTT RADIO APPARATUS Arthur M. Trogner, Maplewood, N. J., assigner to Wired Radio, Inc., New York, N. Y., a corporation of Delaware Application August 19, 1931. serial No. 558,045 3 Claims. (o1. ric- 2.5)

My invention pertains in general to radio receiving means and specically relates to radio receiving apparatus for receiving either Wired radio or space radio signals.

One of the objects of my invention consists in providing a radio receiving system in which com- Inonly controlled means are provided for receiving either wired radio or space radio signals.

Another object comprises providing radio apparatus in which common variable condensers and an associated indicating dial are Vprovided for co-operation with different circuits for the reception of either Wired radio Orspaoe radio signals.

A further object consists in providing `radio apparatus having variable condensers adjustable by contiguous increments for space radio reception and movable in predetermined steps for wired radio reception.

I accomplish these and other desirable objects in a novel radio apparatus having variable condensers common to Wired radio and space radio reception circuits mechanically connected with an indicating dial provided with an aperture mask movable under control of a selection switch for either wired radio or space radio reception.

In the drawings which accompany and form a part of this specification and in which like reference numerals designate corresponding parts throughout:

Fig. 1 is a side elevation and partially sectioned View of one embodiment of the radio apparatus of my invention;

Fig. 2 is a fragmentary transverse sectional view along the line 2 2 of Fig. 1;

Fig. 3 is a fragmentary transverse sectional View along the line 3 3 of Fig. 1.

Fig. 4 is a fragmentary sectional view along the line 4 4 of Fig. 1; and

Fig. 5 is a diagrammatic representation of the electrical circuit employed in the present embodiment of my invention.

My invention is directed to'providing a radio receiving system having common variable con-v densers and an associated indicating dial for re-` ceiving carrier frequency signals or space radio signals over diierent circuit paths. In accordance with my system these variable condensers space radio reception and are adjustableinA predetermined steps for wired radio reception,V Referring to the drawings in detail and particularly to Figs. 1 and 3, I provide a base member 1 having a mounting structure 2 secured thereto. A plurality of Ygroups of variable condenser stator plates 3, fi, 5, and 6 are mounted upon insulating members within a frame l ernber l1 mounted on top of the mounting structure 2. A pluralityof groups or variable condenser rotor lplates 7, 8,' 9, and 10 are mounted on a shaft i3 for engage- 60 ment with their respective groups ci stator plates 3, 4, 5, and 6. The shaft 13 is journaled between two extremities or" member 11 and extends through an aperture in a panel 14 secured to the base l. A knob 15 is secured to the 'end oi 65 the shaft 13 to permit manual rotation of the groups oi rotor plates 7, 8,79, and 1o with respect to their associated statorplates. In accordance with my invention a dial 17 is rigidly mountedl upon the shaft 13. As shown in Fig. 2, this dial v17 is provided with a plurality oi radial lines and corresponding numbers for indicating the relative position of the variabie condenser rotor lates and stator plates as well as the designations A, B, and C for indicating predetermined positions or" the variable condenser rotor plates with respect to the stator plates.

A masking plate 20 is mounted on the shaft 13 in a manner such that it is free to rotate thereon. This masking plate 20 is provided with 80 two apertures 2l and 22 angularly displaced from one another, as shown in Fig. 2. The aperture 21 is adapted to register with the space radio radial designations on the dial ll, while the aperture 22 isadapted to register with the wired 85 radio designations A, E, and C on the ial 17; The apertures 2l and 22 may be brought into register, one at a time, with a larger aperture'23 in the front panel 14.

A knob 2e is rigidly mounted upon a shaft 26 90 which is rotatably mounted in a bearing member in the mounting structure 2. The shaft 26 carries an arm 27 pivotally coupled to the masking plate 2O by a pivot 28.A The shaft 26 also Vcarries a Clicker member 29 having two indents therein 95 for receiving a resilient detent member 3u secured to the mounting structure 2 by a lug 31. The indents in the Clicker member 29 correspond to the two different positions the masking plate 20 in which the apertures 2l and 22 are respec- 100 tively in register with the aperture'23.

A Clicker disk 33 is rigidly secured to the shaft Y 13 and is provided with three peripheral indents are adjustable by contiguous increments for 34 corresponding to the three angular positions vof the dial 17 in which the designations fA, 105

B, and C are individually in register with the aperture V28 of panel e. I A detent member' 35 is pivotally mounted upon the frame member 11 for engagement with the indents 34 of the Clicker disk 33. The member 35 is provided with a 10 flange 36 upon which a roller 37 rides. The roller 37 is pivotally mounted on an arm 38 rigidly secured to the shaft 26 adjacent the hub of the arm 27. A compression spring 39 is mounted between a pillar 40 and the member 35 whereby the member 35 is normally held in peripheral engagement with the clicker disk 33.

A link member 41 is pivotally connected at its center portion with an extended part of the arm 38. The extremities of the link member 41 are pivotally connected to two switch arms 42 and 43 which are pivoted upon the mounting structure 2. The arms 42 and 43 are each `secured to an insulating bar 45, (see Fig. 3) which carries a plurality of switch'contacting knives. These contacting knives are indicated 'in Fig.'5 as contacting knives 46, 47, 48, and 49 which are mounted upon the insulating bar of the switch arm 42, while the switch contacting knives 58, 51, 52, and 53 are mounted on the insulating bar l45 mounted onthe switch arm 43. These :switch contacting knives engage with respective- 1 ly disposed contacting clips 54 which are secured to`insulating strips 55 mounted on the frame `member lol. The switch contacting'knives 47, 48,

and`4`9 Vand their respective terminal clips mounted on the side of the frame memberll adjacent the contacting knife 46 are not shown'in the drawings but exactly correspond in structure to the corresponding elements on the other side of the frame member l1 as shown in YFig. 1. A

The electrical organization ofk my invention will now beconsidered. Referring to Fig. 5, a

-space radio energy collecting system comprising an anten'na'i)` and ground 6l are connected vthrough an inductance 62 electromagnetically coupled to an inductance 63. The inducta'nce 63 Yis connected in series with an inductance 64, elec- Itrornagnetically coupled to an inductance 65 and through switch element 50 with the variable yconc'lenserplates v3 andf7. The inductance'65 is connected in series with an inductance 66, electromagnetically coupled to anindu'ctance 67, and 4through switch'elenientl 51 with condenser plates Auand 8, while the inductance 67 is connected fin series -withfan inductance 68,Ielectroniagne'ti cally coupled to anfinductance 69, and through *switch element 5 2'with condenser plates 5 and'9.

The inductance 69 is connected through switch element 53 to the condenser` platesand 1,0 and jaresistance 70. I combination with the condensers 3v-7, 4-8, 5 9, and 6-10 forml a plurality of inductivcly Ycoupled meshes comprising a band pass vfilter having a terminating impedance -of a. proper The inductances 62 `to 69 in value inthe resistance'i70. The output of Vthis v'filteris' connected as shownin'liig. 5 to the control electrode and cathode of a spacedischarge radio frequency amplifier tube 72. The

output or anode to cathode of circuit of thespace discharge tube 72 includes the primary winding of a radio frequency transformer 75. TheY secondary winding of the radioV frequency vtransformer 75 is connected to the cathode Aand through a condenser and grid leak 76 to the control electrode of a space discharge detector tube The output or anode to cathode circuit of- 73. the space discharge tube 73 includes the primary ofan'audio frequency transformer 77 having the secondary winding thereof connected between the control electrode and cathode` of a space 'discharge audio frequency amplifier tube 74. The

'output or anode to cathodercircuit of the space discharge tube 74 includes the primary winding '15 of an audio frequency transformer 78 having the Asupplying operating voltage by means of a rectifersyst'em to the space discharge tubes 72, 73,

and 74 in lieu of the batteries which are shown 'inFig for theisake of simplicity.

Anindu'ctance 84, electromagnetically coupled to an inductance`85, is connected in series with 4thefindu'c'tance 83 andthrough switch element 46 to the condenser plates 3 co-operating with condenserfpla'tes 7. An inductance 86, electromagnetically coupled to an inductance 87, is connected in series with the inductance V and Atlnmigh switchvelenient A47 with condenser plates 4 co-operating with condenser plates 8. An inductance 88, electromagnetically coupled to an inductance V39, is connected in `serieswith .the inductance "87 and 'through switch element 48 withV condenser plates'5 co-.operating with condenser plates 9. The inductance 89is connected in series with a resistance `9`3and throughthe switch element49 with kcondenser plates 6 cooperating with the'condenser plates 10. The inductances 83 to 89, in combination with the condensersB-"l, 4-3'5-9, and 6-10, form a plural- `ity of inductively coupled meshes comprising a band pass filter having a terminating impedance of a proper valuein vthe resistance 90. This last -described `filter system is adapted to select carrier frequency energy at one frequency Vtransmitted over power lines 80. The output yof this liilteris connectedto the v control electrode and cathode of the space dischargeradio frequency amplifierV tube '12.

o Referring t6 Figs. land 3, space discharge tubes 72, A73, and 74 are mounted upon the rear portion ofthe mounting structure2. The inductances 62 to 69 and theinductances 83 to 39l are mounted Within shielding compartments 91 -with- `in the-mounting structure 2.

In the operation of my radio apparatus-for l'.

receptionof space radio signals, the electrical circuitswill be :inra condition las depicted in Fig. 5. That is, the switch 'blades 50 to .-53 will be closedwhile the switch blades-246 to 49 will be This is ymechanically-accornplishedby-t fmanual movement ofknob 24'shown in Fig. 1

Open.

whereby the linkwmem'oer 41 -is llongitudinally move the switch blades referred v`to. 'At the same 21 is in register with the radial designations on the'dial 17 `for-indicating, at the` aperture 23,the

relative'positi'on ofthe rotor plates'l to l-with y'reference'to the'rotor-'plates 3 to^6 inclusive. In this space radio reception position, the member 38-r will also 'be `in a position as.depictedY in Fig.

4 inwhich the roller 37has depressed the ange 36 to cause the detent member 35 to be disen-I gaged from the periphery 'of thejclicker. diskl33. The knob 15 can now be manually moved. by `contiguo'us increments .foreny desiredfpositionof thecondenser rotor plates 7,1 8, 9, and 10-whose `position will be indicated by the indicia oli-.dial

17 at the aperture 23 as appearing through the smaller aperture 21 in the masking plate 20.

Referring to Fig. 5, the space radio signals will be received over the space radio energy collecting system 60-61 and the selective filter system connected therewith. The knob 15 may be manually rotated for proper adjustment of the condenser rotor plates 7, 8, 9, and 10 whereby the selective lter system coupled to the space radio energy collecting system 60-61 is rendered responsive to any desired space radio program at any particular frequency. The space radio signals are amplied by the radio frequency amplifier tube 72 and detected by the detector tube 73 for reproduction over the audio frequency system including space discharge tube 74 and translating device 79. It is an especial feature of my invention that, for space radio operation, the knob 15 may be moved by contiguous increments for adjustment of the Variable condensers for selection of a great many different frequencies which may be closely adjacent on the frequency spectrum. v

For the operation of my radio apparatus for the reception of Wired radio signals, the knob 15 is manually moved into a position such that the aperture 22 is in register with the wired radio indications A, B, and C on the dial 17 at the aperture 23 in panel 14. In this position of the masking plate 20, the switch arms l42 and 43 will have been moved into a position such that the switches 46, 47, 48, and 49 will be closed and the switches 50, 51, 52, and 53 will be open. At the same time, the arm 38 mill have moved the roller 37 into a position such that the flange 36 will be released whereby spring 39 will force the detent member 35 into peripheral engagement with the clicker disk 33. The clicker disk will then have a tendency to be arrested at the angular positions in which the detent member 35 engages in the indents in the disk 33 which correspond to the angular positions of the dial 17 in which the designations A, B, and C are in register with the apertures 22 and 23, now co-incident. The circuit conditions now prevailing will be such that the electrical system will be responsive to carrier frequency energy at a selected one of the three frequencies transmitted over the power lines 80. The condenser rotor plates 7, 8, 9, and 10 can now be adjusted by the manual control knob 15 from one angular position to another as predetermined by the detent member 35 co-operating with the peripheral indents of the clicker disk 34. For wired radio reception the space radio filter reception circuits are electrically ineffective, while for space radio reception the wired radio or carrier frequency reception circuits will be electrically ineffective.

It will be apparent that the knob 24 can be turned to either of two positions for space radio or wired radio reception. For space radio reception the masking plate 20 will be moved into a position such that the radial designations on the plate 17 will be in view as the knob 15 is rotated by contiguous increments for selection of any desired space radio program as determined by movement of the variable condensers connected with the space radio reception circuits. For wired radio reception the masking plate 20 will be in a position such that the designations A, B, and C will be in view at the aperture 25. 'Ihese designations correspond to the predetermined angular positions of the dial 17 for the three settings of the variable condensers as associated with the carrier frequency reception circuits for receiving any one of the three program modulated carrier frequencies. It will be obvious that the foregoing arrangements comprise compact and efficient radio apparatus for the reception of either wired radio -or space radio signals. One of they chief advantages to be derived from my radio apparatus resides in that common tuning elements and a common audio frequency system are employed for the reception of signals transmitted through space or over wires. Although I have shown a preferred embodiment of my radio apparatus it will, of course, be understood that changes can be made therein without departing from the intended scope of my invention. I do not, therefore, desire to be limited to the foregoing except insofar as may be pointedout in the appended claims.

What I claim as new and original and desire to secure by Letters Patent of the United States is:

1. A radio receiving system comprising, a space radio energy collecting system, space Aradio signal reception circuits coupled to said space radio energy collecting system, Wire lines for conveying carrier frequency energy, carrier frequency signal reception circuits coupled to said wire lines, space discharge tubes for amplifying signals received over said space radio signal reception circuits or over said carrier frequency signal reception circuits, adjustable condensers, mechanical means for moving said condensers, means for connecting said condensers to either said space radio receiving means or to said carrier frequency receiving means, a dial having two different groups of indicia thereon, said dial, being mechanically connected with said condensers, and masking means for rendering said groups of indicia visible one at a time.

2. A radio receiving system in accordance with claim 1 including switches for connecting said space radio signal reception circuits to saidcondensers, other switchesfor connecting said carrier frequency signal reception circuits to said condensers, and common mechanical means for actuating said switches and said masking means.

3. A radio receiving system comprising, a space radio energy collecting system, space radio signal reception circuits coupled to said space radio energy collecting system, wire lines for conveying carrier frequency energy, carrier frequency signal reception circuits coupled to said wire lines, space discharge tubes for amplifying signals received over said space radio signal reception circuits or over said carrier frequency signal reception circuits, adjustable condensers, clicker means for predetermining the extent of the required movements of said condensers for reception of said carrier frequency signals at each'of several predetermined frequencies, switches for connecting said space radio signal reception circuits to said condensers, other switches for connecting said carrier frequency signal reception circuits to said condensers, a dial mechanically connected with said condensers and having different groups of indicia thereon one of which is for carrier frequency signal reception and the other of which is for space radio signal reception, masking means for rendering Vsaid groups of indicia visible one at a time, and common mechanical means for 145 operating said masking means, for operating said switches, and for controlling said clicker means.

' AAR'IHUR M. TROGNER. 

